The post-mortem examination was carried out on Monday and lasted more than six hours but no cause of death was determined.

"There is no macroscopic evidence that allows us to determine his death,'' coroner Cristian D'Ovidio said in quotes reported by Gazzetta dello Sport. "Further tests are needed, even of toxicological nature.''

Morosini, 25, died after collapsing while playing for Livorno in a match at Pescara on Saturday afternoon.

Livorno, the club Morosini joined on loan from Udinese in January, have confirmed that his body will arrive at the Armando Picchi stadium on Tuesday in order to allow fans to pay their respects.

Morosini's body will then be taken to his home city of Bergamo where a funeral will take place on Thursday.

Earlier on Monday, Livorno announced that Morosini's number 25 jersey would be retired and called on certain media outlets to cease broadcasting images of the incident.

"In the name of Morosini's family, Livorno kindly asks all national and international media to stop showing the video images and photographs of the time when Piermario collapsed on the pitch and of its,'' a statement read.

Meanwhile, an inquiry into Morosini's death has been opened after a parked car belonging to traffic police blocked the ambulance's path into the stadium on Saturday.

One of the car's windows had to be broken in order for it to be moved, and the mayor of Pescara, Luigi Albore Mascia, revealed he was taking the issue seriously.

"There has been an admission of responsibility from the traffic policeman that on Saturday parked his car in the stadium, thus blocking for a few minutes the entrance of the ambulance to the pitch,'' Mascia told Gazzetta dello Sport. "It is an unforgettable act that is serious.

"But, if the medical assistance was considered timely as I believe it was, then it is wrong to place direct responsibility on the traffic policeman regarding the death of the unfortunate player.''